"...throw every light in the game into a grid, on a single texture. With a 2048x2048 texture..."

I'm sure this is a naive question, but... isn't it enough to draw the visible lights and bake them into a frame buffer that's the same size as the game frame buffer? This is what I'm doing

Thanks for sharing this! It's very relevant to what I'm doing!

I'm also finding all the surrounding tiles, extruding those edges that face the light outwards and drawing a quad. What I didn't understand about the article is the following: (1/2)